<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id='app'>
        <ul>
            <li v-for="(item,index) in list" :key="index">{{item}}</li>
        </ul>
        <button @click="go">走一走</button>
    </div>
    <script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>
    <script>
        const app = new Vue({
        el: '#app',
        data: {
            index:0,
            list:['美女','程序猿','帅哥']
        },
        methods:{
            go(){
                
                // 方法1
                // ! 使用slice抽取数组的第一个元素，然后通过concat拼接到数组末尾
                //   this.list =  this.list.slice(1).concat(this.list.slice(0,1))
                
                // 方法2
                this.list.push(this.list.shift())
                
            }
        }
    })
    </script>
</body>
</html>